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Remove superfluous autoprewarm check

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autoprewarm_database_main() prewarms blocks from the same database. It
is passed an array of sorted BlockInfoRecords and a start and stop index
into the array. The range represented should include only blocks
belonging to global objects or blocks from a single database. Remove an
unnecessary check that the current block is from the same database and
add an assert to ensure this invariant remains. Doing so removes a
special case that makes future refactoring to accommodate read
streamifying autoprewarm easier.

Noticed off-list by Andres Freund
This commit is contained in:
Melanie Plageman
2025-04-04 15:25:17 -04:00
parent b3f1a13f22
commit 7f848cb788
1 changed files with 3 additions and 5 deletions
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8
contrib/pg_prewarm/autoprewarm.c
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@ -463,12 +463,10 @@ autoprewarm_database_main(Datum main_arg)
CHECK_FOR_INTERRUPTS();
/*
* Quit if we've reached records for another database. If previous
* blocks are of some global objects, then continue pre-warming.
* All blocks between prewarm_start_idx and prewarm_stop_idx should
* belong either to global objects or the same database.
*/
if (old_blk != NULL && old_blk->database != blk->database &&
old_blk->database != 0)
break;
Assert(blk->database == apw_state->database || blk->database == 0);
/*
* As soon as we encounter a block of a new relation, close the old